1. Yu. S. Privis, V. A. Smirnov, and I. A. Shcherbakov, Determining the Optimum Working-Particle Concentrations in Laser Media: FIAN Preprint No. 175 [in Russian], Moscow (1982);
2. Kvantovaya Elektron.,10, No. 7, 1338?1343 (1983).
3. Yu. S. Privis, V. A. Smirnov, and I. A. Shcherbakov, Calculating Optimum Working-Particle Concentrations in Doubly Activated Laser Media Working in Continuous-Wave Mode: FIAN Preprint No. 176 [in Russian], Moscow (1982), p. 11.
4. E. V. Zharikov, N. N. Il'ichev, and V. V. Laptev, Luminescent Spectra and Lasing Features of Gadolinium-Scandium-Gallium Garnet Crystals Activated by Neodymium and Chromium Ions: FIAN Preprint No. 14 [in Russian], Moscow (1982), p. 15; Kvantovaya Elektron.,10, No. 1 140?144 (1983).
5. E. V. Zharikov, V. A. Zhitnyuk, G. M. Zverev, et al., Active Media for Highly Efficient Neodymium Lasers with Unselective Pumping: FIAN Preprint No. 197 [in Russian], Moscow (1982), p. 9; Kvantovaya Elektron.,9, No. 12, 2531?2533 (1983).